Adapter



FIG. 1 is a perspective view of an adapter, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right elevational view thereof, wherein the left elevational view of the adapter is a mirror image of FIG. 4;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for an adapter, as shown and described. 